Basf Aktiengesellschaft

Ludwig-Maximilians-Universitaet

Basf Se Corporation

Ludwig-Maximilians-Universitat München

Gabriele Lang

Hans Peter Rath

Arno Lange

Helmut Mach

Stephan Hueffer

Stephan Hüffer

Eckard Schauss

Darijo Mijolovic

Herbert Mayr

Mirjam Herrlich-Loos

Jens Kremeskötter

Elmar Stöckelmann

A process for the preparation of polyisobutene containing at least 75 mol % of terminal vinylidene groups, in which isobutene or an isobutene-containing hydrocarbon mixture is polymerized in the liquid phase in the presence of a boron trifluoride complex catalyst having the compositiona(BF):b(Co1):c(Co2)where Co1 is at least one tertiary alcohol, Co2 is at least one compound selected from water, primary alcohols, secondary alcohols, dialkyl ethers, alkanecarboxylic acids and phenols, the ratio c:b is from 0.9 to 1.8 and the ratio (b+c):a is from 0.9 to 3.0, is described.

Method for the production of polyisobutene

A process is described for functionalizing isobutene polymers having terminal olefinic unsaturation by treating with the reaction product of a borane source with from 0.5 to 1.8 equivalents of an alkene having a molecular weight of less than 250 per mole of borane or by treating the isobutene polymer with the borane source in the presence of the alkene. The reaction mixtures retain low viscosity and good stirrability.

Isobutene polymer functionalization by means of hydroboration

Substituted 7- to 12-membered cycloalkanes which have leaving groups, in particular chlorine atoms, on tertiary ring carbons, a process for preparing them and their use as initiators for cationic polymerization, in particular the cationic polymerization of isobutene are described. Preferred compounds are 1,4-dichloro-1,4-dimethylcyclooctane, 1,5-dichloro-1,5-dimethylcyclooctane and mixtures thereof. They are prepared by addition of hydrogen chloride onto appropriately substituted cycloalkapolyenes.

Substituted cycloalkanes, and use thereof as cationic polymerization initiators

In a process for the polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers under the conditions of living cationic polymerization, the initiator system additionally comprises at least one nonpolymerizable, aprotic organosilicon compound having at least one Si&#x2014;O bond.

Method for producing homopolymers and copolymers of isobutene

&#x3b1;-Chloroisopropyl-substituted aromatics are obtained in high yield by treating isopropenyl-substituted aromatics with hydrogen chloride gas in the absence of a solvent. The &#x3b1;-chloroisopropyl-substituted aromatics serve as initiators for the cationic polymerization of isobutene.

Production of &#x3b1;-chloroisopropyl-substituted aromatics

The present invention relates to a process for preparing an isobutene polymer using a cyclopentene derivative as initiator and to the isobutene polymer obtainable by means of the process and to particular functionalization products thereof.

Method for the production of isobutene polymers

Homo- and copolymers of isobutene are prepared by continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising:

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Mannheim, Germany

Gabriele Lang